hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 388

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 10 Serial Communication Interface
Bit 4—Framing Error (FER)
Bit 4 indicates that a framing error has occurred during reception in asynchronous mode.
Bit 4
FER
0
1
Notes: 1. When bit RE in SCR3 is cleared to 0, bit FER is not affected and retains its previous
Bit 3—Parity Error (PER)
Bit 3 indicates that a parity error has occurred during reception with parity added in asynchronous
mode.
Bit 3
PER
0
1
Notes: 1. When bit RE in SCR3 is cleared to 0, bit PER is not affected and retains its previous
Rev. 7.00 Mar 10, 2005 page 346 of 652
REJ09B0042-0700
2. Note that, in 2-stop-bit mode, only the first stop bit is checked for a value of 1, and the
2. Receive data in which a parity error has occurred is still transferred to RDR, but bit
state.
second stop bit is not checked. When a framing error occurs the receive data is
transferred to RDR but bit RDRF is not set. Reception cannot be continued with bit
FER set to 1. In synchronous mode, neither transmission nor reception is possible
when bit FER is set to 1.
state.
RDRF is not set. Reception cannot be continued with bit PER set to 1. In synchronous
mode, neither transmission nor reception is possible when bit FER is set to 1.
Description
Reception in progress or completed *
Clearing condition:
After reading FER = 1, cleared by writing 0 to FER
A framing error has occurred during reception
Setting condition:
When the stop bit at the end of the receive data is checked for a value
of 1 at the end of reception, and the stop bit is 0 *
Description
Reception in progress or completed *
Clearing condition:
After reading PER = 1, cleared by writing 0 to PER
A parity error has occurred during reception *
Setting condition:
When the number of 1 bits in the receive data plus parity bit does not
match the parity designated by bit PM in the serial mode register (SMR)
1
1
2
2
(initial value)
(initial value)